In the solemn Forbidden City, there was a bustling scene. Cao Renchao, the chief eunuch of the Eastern Depot, was deeply favored by the Emperor, held a high position, and always served by the Emperor's side. He often pretended to have no martial arts skills, but in reality, he kept his true abilities hidden. However, there were twelve special secret agents inside the palace, arranged according to the Chinese zodiac from Rat to Pig. They were established by the previous emperor and only took orders from the current emperor. Within the palace, these twelve agents were usually stationed in various places to gather intelligence. They had trained hard in martial arts from a young age and were sent to the mountains to fight tigers and wolves. They could transform into various shapes to disguise their identities and were responsible for ensuring the Emperor's safety within the palace. Among them, Lingling Dog was the most special one, and a series of grudges and entanglements unfolded around him in the palace...